The Auto Enginuity has more direct readings, does bluetooth, and supports both PDA's and PC readouts & logging. The "dongle" that plugs into the ODBII port is about 6" long, so you can't conveniently leave it plugged in for long periods. It will capture & graph O2 sensor readings, timings, Long Term & Short Term fuel trim, MAF flow rates, and lots of other details. No "derived" values. Notably, it does NOT track/log OPEN/CLOSED loop operation, nor system voltage (you can see the current value of either by digging through menus, but they are not tracked/graphed the way the other parameters are).

The SGII is really more of a leave-there-all-the-time monitoring tool. Less details, more "programmable", and very useful. It will display derived MPG & HP values, along with quite a few other ODBII parameters, including OPEN/CLOSED loop status. It's selection of values to display is more limited than the AutoEnginuity.

I picked up a low end code reader/reset unit for the Bronco. It worked just fine for what it did, i.e. read out stored codes and reset the check engine light. Since putting on headers and a new exhaust, the check engine light has not been an issue. The reader is not nearly as sophisticated as the units discussed earlier in the thread but for $30 I could monitor the codes and reset the light as needed.

I use this thing called Techstream. It's actually a laptop (Toughbook) and has a special adapter that connects to the bottom creating and interface between the OBD2 and the laptop. It lets you graph anything the ECU reads and can even download ECU updates to the ECU or anything else that has a computer. It will even interface with Toyota Information System, and is sponsored by Toyota, costs about 8,000 dollars and sits at Burt Toyota until I need to use it :tongue: Neener, neener!

I use this thing called Techstream. It's actually a laptop (Toughbook) and has a special adapter that connects to the bottom creating and interface between the OBD2 and the laptop. It lets you graph anything the ECU reads and can even download ECU updates to the ECU or anything else that has a computer. It will even interface with Toyota Information System, and is sponsored by Toyota, costs about 8,000 dollars and sits at Burt Toyota until I need to use it :tongue: Neener, neener!

But those sound cool too.

Hmmm. Are there any Toyota updates to the 1996 Land Cruiser ECU? If there are, what do they do?

I wish this was available for OBDII. It is software for Buell motorcycles. With a USB to TTL serial cable, it communicates directly with the motorcycle's ECM. You can change any value. Which means of course that you can screw yourself up royally, but if you fetch the original EEPROM, you can save it to flat file and burn it to CD. You can always go back.

This is the overview. Pretty basic, but notice you have the O2 (EGO) voltage and correction factors for closed loop. This sets the Adaptive Fuel Value (AFV) the ECM uses to correct the mixture. It tells you how far off you are.

ECM Runtime gives you more info, in realtime. Sorry I don't have a running screenshot. It's cool.

These are the fuel and timing maps. You can manipulate any cell and burn it to the EEPROM. It also has realtime feedback on which cell the motor is on at any particular time. You can show the CL regions, WOT regions, etc. (which I did in the screenshot, I did not draw these lines).